Apparatus for shaping the outer casings of pneumatic tires.



4 v G. W. BELL. APPARATUS FOR SHAPING THE OUTER GASINGS OF PNEUMATIC TIRES.

APPLIWLTION fILED M AY16, 1911.

Patented Mar. 23, 1915.

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GEQIRGE WILSON BEL-S, 0F STOCIG QEBT, GLAEI").

JEEEJQEfiTUS 36B $HJ3JTIN G QUTEP. CASENGSS 0F PNEUI 'IATZC TIRES.

riginal applioesion files February is, 1911, serial No. 807,811.

Serial No. 627,432.

may 0072 that l, Gnonsn 'WiLsoN BELL, 1e King of Great Britain and 1 resident of Stochport, in the nesrer, England, have invented certain new and useful Improvements in and Pertaining to Apparatus for Shaping the Outer Casings which the following is a specification.

This application for Letters Patent re laies to apparatus for making leather outer casingsor covers for the air tubes of pneumatic tires according to the method of man nfaciure described in the specification and forming she subject matter of concurrent application, Serial 33o 6214283: In this method of manufacture bead suitable for securing the tire to an ordinary clenchcr or I gens wheel rim is formed at each edge of an annular band of leather of c -shape in by bending a lateral edge portion of'lzhe band inwardly around a suitably order to form a recess 50 the reception of shaped removable beau-forming piece in piece, and finally securing suitably shaped core in said recess.

The apparatus forming the subject matter of ibis applicat on comprises the various features hereina defined and set out in the claims, and is illustrated by the acconr panying drawings, of which,

Figures 1 and 2 are cross-sections of two exainiiles of leather tire covers made bjrrappararus according to this application, 3 shows the apnaratus lll-Velilfifil section, and Fig. 4 is a view taken at right to Fig. 8 and corresponds partly to the line V o' Fir. 3, Wl1lCl1 itself corresponds to the line HI o Fig. 4.

In each of the examples or sire covers shown in Figs. 1 and 2, l is a strip of leather curved to-the ordinary cross-sec: tional form or a we cover, and at each oi its edges so bent about a core 2 as to form in conjunction with the core a bead 3 suitable for securing the tire to an ordinary clencher or analogous Wheel rim, she extreme edge pcrrion of the strip each side thereof Specification of Letters Patent.

"f Pneumatic Tir s, of

23, Elfilfi.

Divided and this application filed Hey is,

rial, or each core :2 may itself be a ring of inextensible inalcerial.

The cover may as shown, be provided With a lining 59 of thin leather, which may be cemented thereto, except at its edges, which are suitably secured, to the edge portions of the cover ll as by being cemented thereto.

To protect the tread portion of the cover, is, a ring formed of a U-sbaped strip of undried chrome leather, or composed of two or more such strips and laced end to end and having their chanifered ends secured together, may be cemented to the exterior of the cover re, the joints of the ring 56 being arranged so as not to be opposite those of the cover Another similar ring 57 may, as shown, be cemented to the exterior of the ring 56. The ring or rings 56 and 57 which arerenewable, may advantageously, in addieion to being cemented, be secured to the cover by means of rows of stitchingbS, and may be formed or provided with suit able non-skidding or Wear-resisting devices.

The apparatusshon'n in Figs. 3 and 4, comprises an annular mold 11, and dies 10 of semi-circular cross-section-ior clamping the ii-shaped band of leather in the mold 11. is will be seen from Fig. a the dies 10 are sis: in nuniber, and, to facilitate insertion into the mold, are made so that'each overlaps radially inward an adjacent one, and one of them thus overlaps two adjacent ones. Against the edges of the mold 11 are adapted to be arranged transversely movable dies 1G, which form annular continuations of the mold 11, and are adapted to be moved tram- .rersely bynieans of screws 17 engaging in lugs 18 injecting from the mold 11. For ihe purpose of enabling the dies 16 (and the bead-forming pieces 1e and dies 28 hereinafter referred to) to be inserted and removed the legs on half of the perinherv at each side of the mold 11 are adapted to'slide radially in the mold, as indicated in the upper half of Fig. 3.

For the purpose of molding the edge portion of the cover (Fig. 3) bead-forming pieces i l (of Whiclrthere are three at each side r'o facilitate insertion) are located between the two dies 15, and beuveen the beadforining pieces 1,4 at opposite sides ofthe mold are adapted to be moved radially out- Ward dies 15, which are similar to the dies 10 as to number and as to overlapping. The dies 10 are forced into and held in position by means of screws 19 engaging in a block 20, mounted loosely on a shaft 21, which, when the block 20 has been brought into position,-is supported by a bracket 22- and a standard 23,

To efi'ect drying of the leather during the process of molding the'mold 11 is formed with cavities 31, which are supplied through unions 32 with steam or hot water, and the plates, indicated by dotted lines in Fig'B,

may be placed between the screws 17 and the dies 28, the shaft .21 being first withdrawn,

1 and the chamber formed b and between the plates. connected, .as indicated by dotted lines, with an air-pump B5.

To enablethe mold to be rotated freely to facilitate the manipulation of the leather and 'of the. apparatus, the mold -11 is supported by two rollers 36 mounted on a base piece 37 to which are secured the bracket 22 and the standard23, which at its upper end has a' horizont'al'portion 38 from whicha set-screw 39 projects into an annular groove 7 in the moldll.

In the drawings the mold 11 is shown con-- staining a liner 13 Whichis intended to be) removed when, as may, advantageously be done, the two ext ernal bands or rings 56 and 57 are formed simultaneously in the mold 11. 'In such a case internal dies slightly diiiering in form from the dies 10 are employed. l

In using the.hereinbefore. described apv paratus to make a tire cover -a band 9 (Fig.

;3) formed of a strip of undried chrome leather, or composed of two or more such strips placed end to end and having their chamfered ends secured together, is clamped 1 in the mold 11 by the dies 10 so that itassumes a U-shape in cross-section-andhas. its edge portions '12,,which are chamfe'red, projecting radially inward, as indicated at;

9 by dotted lines in Fig. 3. The projecting edge portions 12 are then turned laterally inward over the bead-forming pieces 14 by means of tl transversely movable dies, or mold continuations', 16, and the laterally inturned portions forced radially outward and pressed against the bead-forming pieces 14 by means of the internal radially movable dies 15. The dies 16 are then still farther dies 10 and 15 are perforated to allow of the escape of vapor.. To assist, the drying-.-

. with which the cover ,is' to be used. band, or partly finished cover is, if necespressed the edge portions against the in ternal faces of the bead-forming pieces 14 is any appreciable pressure brought to'bear on the external lateral faces of thebeadforming pieces by the dies 16 to force the leather against the, bead-formingpieces to produce the bead recesses 24. The tire cover.

may besubsequently finished by pressing the turned over edge portions 12 of the strip, preferably alter thenapplication of tion of the beads 3, and suitable internal .adhesive'materlal against thelnternal faces;

of the side walls 260i the partly formed} cover;44'by means of suitable external dies which-are adapted to complete the forms,

dies which are adapted to give-t0 the interior of the radially internal portion of the cover a shape suited'to the securing devices The sary,.,cu't to the length required to produce a cover of the desired diameter and the chamferedvends of the str1p,'or strips,.are.%

cemented, and, if necessary, sewn, togetlienf It will be evident that hydraulic or pneumatic apparatus might be employed instead;

. of screws for operating the various diesg What I claim is 1. .A device tor shaping the outer casings of pneumatic tire's, comprisi-ng, in combina tion, an annularbead-forming piece, a transversely movable die adapted to press'an edge portion of a band of leather a ainst said bead formingpiece and to turn radially internal portion thereof. transversely over said bead-forming 7 piece, and a radiaily movable dieadapted to act on said internal portion so turned transversely and to press it radially outward against said head-farm, ing piece. to form a recess suitable for the receptionof a core. I v

'2. A dBV16f0I"Sl11PlI1g the outer casingsof pneumatic tires, comprising, in ecmbinaw tion, a inoldof concave cross-section, means for clamping a band of leather n said mold,

an internal bead-forming piece, a trans versely movable external die adapted to act upon the outer side of a projecting edge portion of a'band so clamped and to turn-a radially internal portion thereof laterally inward over said bead-forming piece, and a radially movable internal die'adapted to act on said internal portion so turned laterally inwardand to press it radially outward against said bead-forming piece, to form a recess suitable for the reception of'a core.

A device for shaping the outer casings of pneumatic tires, comprising, in comhination,-an annular bead-forming piece, formed v'vlth an annular groove on one side, a transversely movable die provided with an annular projection corresponding to said annular groove and adapted to press an edge POItlOll of band of leather against said ,bead-forinr ing piece and to turna radially internal crtion thereof transversely over said bead- Itorming piece, and a radially movable die adapted to act on. said internal portion so turned transversely and to press it radially outward against said bead-forming piece to form a recess suitable for the reception of a core. V

4. A device for shaping the outer casings of pneumatic tires, comprising, in combination, an annular mold of concave cross-section, internal dies adapted to clamp a band of leather in said mold, means for securing 'said dies in position said mold, and means for supporting said mold in such manner as movable die adapted to act on said internal portion so turned transversely and to press it radially outward against said bead-form- 'ing piece to form a recess suitable for the reception of a core.

76. A device for shaping the outer casings of pneumatic tires, comprising, in combination, an annular" bead-forming piece, a transverselymovable die adapted to press an edge portion of a band of leather against saidbead-forming piece and to turn a radially internal portion thereof transversely over said bead-forming piece, a radially movable die adapted to act on said internal portion so turned transversely and to press it. radially outward against said bead-forming piece to form a'recess suitable for the reception of a core, and means for moving radially said radially movable die.

7 A device for shaping the outer casings of pneumatic tires, comprising, in combination, an annular bead-forming piece, a transversely movable die adapted to press an edge portion of a band of leather against said bead-forming piece and to turn a radially internal portion thereof transversely over said bead-forming piece, devices for moving said die transversely, a radially movable die adapted to act on said internal portion so turned transversely and to press it radially outward against said bead-torming piece to form a recess suitable for the reception of, a core, and means for moving radially said radially movable die.

8. A- device for shaping the outer casings of pneumatic tires, comprisingfin combination, a mold of concave cross-section, means for clamping a band of leather in said mold, an internal bead-forming piece, a transversely movable die adapted to act upon the outer side of a projecting edge portion of a band so clamped and'to turn a radially internal portion thereof laterally inward over said bead-forming piece, a radially 'movable internal die adapted to act on said internal portion so turned laterally inward and to press it radially outward against saidbead-forming piece to form a recess suitable for the reception of a core, devices for moving said transversely movable die, and abutments for said devices secured to said mold.

9. A device for shaping the outer casings of pneumatic tires, comprising, in combination, a mold of concave cross-section, means for clamping a band of leather in said mold, an internal bead-forming piece, a transversely movable external die adapted to act upon the outer side of a projecting portion of a band so clamped and to turn a radially internal portion thereof laterally inward over said bead-forming piece, a radially movable internal die adapted to act on said internal portion, so turned laterally inward and to press it radially outward against said bead-forming piece, to form a recess suitablefor the reception of a core, devices for moving said transversely movable die, and abutments for said devices secured to said mold, certain of said abutments being movable radially to facilitate the removal and insertion of said clamping means and said external die.

Signed at Manchester, in the county of Lancaster, England, this 4th day-of May,

GEORGE WILSON BELL. Witnesses:

JOHN WILLIAM THOMAS, MALCOLM Samrnnnsr. 

